SCALE is
the size relationship of a model to the real world. Usually, it is
expressed in fractions. Thus, a scale
of 1/43 has dimensions
that are a forty-three the height, length, width and depth of its real-world
counterpart. Another way of doing this is 1:43, or "one to forty-three".
That means that one inch or millimeter of real measure equals forty-three
of the miniature.

Nowadays most diecast
models are generally offered in the scale of 1/12, 1/18, 1/24, 1/32,
1/35, 1/43, 1/48, 1/50, 1/64, 1/72 and 1/87. Nevertheless,
larger scale such as 1/2, 1/6, 1/8 and 1/10 are available in the
market but not common. And the smaller scale like 1/90, 1/100, 1/144,
and 1/2500
etc. are usually crafted for larger vehicles - aircraft and ships.
The scale of 1/38, 1/40 or 1/55 etc in between are not the main stream
in
the industry and seldom made by the major brands.

However,
the size of the models fall in the same scale may slightly variant
from brand to brand. For instance, Autoart’s model will
a bit larger in size than Minichamps’ models; and Collector’s
Model (CsM) is obviously smaller than that of the Corgi. Hence, we
cannot define which brand or company is representing the true scale
indeed while
most collectors may not concern anyway.